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最近笔者拜读了吕亚军老师的文:“一道竞赛题的两种证法及推广”,刘克让老先生的文“不等式a~3/x~2+
Recently, the author read the article of Teacher Lu Yajun: “Two kinds of proofs and promotion of a contest”, Liu Kerang’s article "Inequality a~3/x~2+